† wackenn.
Geology. Obsolete.
= wacke n.
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the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > wacke
wacke1776
wacken1794
wacken porphyry1794
1794 R. Kirwan Elements Mineral. (ed. 2) I. 219 [Basaltine] is most found in basalts, wacken, and lava.
1794 R. Kirwan Elements Mineral. (ed. 2) I. 453 Amygdaloids, and decayed porphyries, and wackens, which bear a strong resemblance to volcanic products, are not much attended to..by volcanic observers.
1800 R. Jameson Mineral. Sc. Isles I. xiii. 221 This hill is composed of horizontal strata of basalt and wacken, which alternate, and rise to the top of the hill like great natural terraces.
1893 Census of India 1891 XXIII. i. i. 8 These two soils are derived from the wearing away of the surface rocks, the basalt going to form the stiff dark soil whilst the amygdaloid wacken disintegrates into a friable earth.
Compounds
wacken porphyry n. a form of porphyry (porphyry n. 3) containing basalt.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > wacke
wacke1776
wacken1794
wacken porphyry1794
1794 R. Kirwan Elements Mineral. (ed. 2) I. 355 Wacken Porphyry... Greenish, blackish, reddish, or yellowish grey, or greyish black, or liver brown.
1807 J. Headrick View Mineral. Arran 61 The hills at the head of Glencloy are composed of wacken porphyry.
1826 Encycl. Londinensis XXI. 233 Porphyrius lamellosus, or wacken porphyry; consisting of wacke and hornblend.
This entry has been updated (OED Third Edition, September 2013; most recently modified version published online September 2021).
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n.1794